Dyfyniad APA

(2013). Improving crop productivity in sustainable agriculture. Weinheim: Wiley-Blackwell.

Dyfyniad Arddull Chicago

Improving Crop Productivity in Sustainable Agriculture. Weinheim: Wiley-Blackwell, 2013.

Dyfyniad MLA

Improving Crop Productivity in Sustainable Agriculture. Weinheim: Wiley-Blackwell, 2013.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.